Pump.



H. W. KIMES.

PUMP.

APPLICATION FILED FEB. 23. 1915.

m Patented Dec.28,1915.

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HUG-H W. KIMES, OF DAYTON, OHIO, ASSIGNOR 'IO TIE VAILE-KIMES COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

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Application filed February 23, 1915.

To all whom it may concern:

Be it known that I, HUGH W. Knms, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Pumps, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to pumps and more particularly to motor-operated pumps of the type commonly called force pumps. In pumps of this kind it is not customary to provide mechanically operated valves, but the valves are usually of a yieldable character and are opened, respectively, by the suction and pressure, created by the movement of the piston. Such pumps are frequently connected with a tank in which the water is stored under air pressure, and this pressure is communicated to the discharge chamber of the pump and tends to resist the opening of the discharge. valves. Consequently, it re quires considerable pressure to unseat these Should the inlet chamber and supply line contain a quantity of air, which may have entered the same by leakage, or otherwise, While the pump is idle, it is necessary to remove this air before water can be pumped. The operation of the piston will not remove the air because the air will compress against the discharge valves without exerting suflicient pressure thereon to unseat them. Consequently, the movement of the piston results merely in the alternate compression and expansion of the air without causing any of the air to be discharged from the pump.

The object of the present invention is to overcome this difliculty and provide means whereby the pump will be enabled to discharge the air therefrom, and, to this end, it is a further object of the invention to provide the pump with a relief port which will permit the air to escape therefrom, under the action of the piston, without passing through the valve controlled discharge port.

The accompanying drawing is a section, partly broken away, taken vertically through a pump embodying my invention.

In this drawing I have illustrated one embodiment of my invention and have shown the same as applied to a motor-operated pump of a well-kncwn construction. This pump comprises a casing 1 having formed therein an inlet chamber 2, which communi- Specification of Letters Patent.

Patented Dec. as, raw.

Serial No. 9,871.

cates at 3 with a source of supply for fluid to be pumped, and a discharge chamber 4 which is provided with an air chamber 5 and communicates at 6 with a discharge line. Interposed between the two chambers are conduits or valve chambers 7 and 8 which,

I in the present arrangement, have portions extending downward on the opposite sides of the inlet chamber 2, from which they are separated by partitions 9. A pumping cylinder 10 is mounted in the partitions 9 and has its ends in open communication with the conduits or chambers 7 and 8, respectively. Mounted in this cylinder is a piston 11 having connected therewith a piston rod 12 which in turn may be connected with any suitable operating device, no such device being here shown as it does not constitute a part of the present invention. The chambers 7 and 8, which are separated one from the other by a vertical partition 13, communicate with the inlet chamber 2 by ports 14 and 15, respectively, these ports being controlled by yieldable valves 16 and 17 mounted within the respective chambers 7 and 8. Any suitable type of valve may be used, and, in the present instance, each valve comprises a dislclike body portion 18 mounted on a stem 19 for bodily movement toward and away from the upper edge of its port, which constitutes the valve seat. The disk like valve member is held normally in engagement with the valve seat by a spring 20 coiled about the stem. 19 between the disk and the head of the stem. In the operation of the pump these valves are opened by the suction created in the respective chambers by the movement of the piston in the cylinder, thus permitting the fluid to be drawn from the inlet chamber into the cylinder.

In the present construction of the pump the upper part of the casing, which contains the discharge chamber 4, is formed separately from the remainder of the casing and is secured thereto by bolts or screws 21. The chamber 4 is separated from the chambers 7 and 8 by a partition which is here shown in the form of a horizontal plate 22 extending between the two parts of the casing and secured in position by the bolts which connect the two parts of the casing. This partition or plate is provided with two ports 23 and 24, connecting the discharge chamber with the respective chambers 7 and 8. These ports are controlled by yieldable valves 25 and 26,

similar in construction to the valves 16and 17. The valves 25 and 26, which are located in the discharge chamber, are subjected to the pressure of the fluid contained in the discharge line and, where the discharge l1ne leads to a tank in which the water is stored under air pressure, the pressure on the valves is considerable. Consequently, if the supply line contains air, as has been above explained, the operation of the piston will merely compress the air in the chambers 7 and 8 without causing it to exert sufficient pressure on the valves to unseat the same. The air, therefore, cannot escape from the chambers and is merely compressed by the movement of the piston in one direction and allowed to expand when the piston moves in i the opposite direction. To relieve this condition and permit of the escape of the air from the chambers 7 and 8 I provide these chambers with relief ports 27 through which the air can escape when forced into the chambers by the action of the piston.

The relief ports may be of any suitable character and may be arranged in any suitable place, but I prefer to provide a permanently open port in the partition or plate 22 which separates the chambers 7 and 8 from the discharge chamber. This port is made very small, and, while it will permit of the passage of a'relatively large amount of air, will permit the passage of a very small quantity of water. Consequently, when water is being pumped the amount of water which will escape through this relief port is negligible and does not in any Way interfere With the operation of the pump or appreciably reduce its efliciency. Inasmuch as the discharge chamber contains water, these constantly open ports will be watersealed against the passage of air from the discharge chamber to the respective eham-- bers 7 and 8. The amount of water which will be drawn from the discharge chamber into the chamber, 7 or 8, upon the suction stroke of the piston is so small that it does not materially affect the action of the piston on the inlet valves.

While a simple opening in the partition 1s all that is necessary to constitute the relief port, such an opening is more or less be deposited and may then work its way into the opening. To further prevent clogging it 1s desirable that the relief port should be as short as it is possible to make it, and I have, therefore, provided the body portions of the nozzles 28 with enlarged bores 29 into which the relief ports open.

The operation of the pump with my invention applied thereto will be readily understood from the foregoing description, and it will be apparent that I have provided a. very Simple device which can be applied to pumps of this character at a very small cost and which will enable the pump to discharge the air therefrom, and, further, that this device, or relief port, does not interfere with or reduce the efliciency of the normal operation of the pump, and, further, that the device is so arranged that there is no external leakage through the port, but that all fluid which passes through the same is retained within the pump casing.

It will be understood that while I have shown the invention as applied to one type of pump that this has been chosen for the purpose of illustration only and that the invention may be applied to pumps of different kinds and may be placed in different locations so long as it affords the necessary means'of escape for the air. I, therefore, Wish it to be understood that I do not desire to be limited to the details of construction and arrangement shown and described, as obvious modifications will occur to one skilled in the art.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a pump, a cylinder, a piston mounted in said cylinder, a casing having a chamber communicating with said cylinder and provided with a port leading to a discharge line, and a. valve to control said port, said chamber also having a valveless relief port.

2. In a pump, a cylinder, a piston mounted in said cylinder, a casing having a chamber communicating with the upper portion of said cylinder and provided with a port leading to a discharge line, and a valve to control said port, said chamber also having a permanently open port leading to said discharge line.

3. In a pump, a casing having a chamber provided with ports leading, respectively, to a source of fluid supply and to a discharge line, valves to control said ports, a permanently open port connecting the upper portion of said chamber with said discharge line, a cylinder communicating with said chamber and a piston mounted for operation in said cylinder.

4. In a pump, a casing having a chamber provided with ports leading, respectively, to a source of fluid supply and to a discharge line, valves to control said ports, a permanently open port connecting said chamber with said discharge line, said open port bemg water-sealed against the passage of air ma am in one direction, a cylinder communicating with said chamber and a piston mounted for operation in said cylinder.

5. In a pump, a casing having an inlet chamber, a discharge chamber and a third chamber provided with ports leading respectively to the inlet chamber and discharge chamber, valves to control said ports, a permanently open port connecting the upper portion of said third chamber with said discharge chamber, a cylinder communicating with said third chamber, a piston mounted in said cylinder, and means for actuating said piston.

6. In a pump, a casing having an inlet chamber and a discharge chamber and also having a plurality of other chambers, each of said other chambers having ports leading respectively to the inlet chamber and the discharge chamber, valves to control said ports and permanently openports connecting each of said other chambers with said discharge chamber, a cylinder communicating with said other chambers, a piston mounted in said cylinder and means for actuating said piston.

7. In a pump, a cylinder, a piston mounted in said cylinder, a casing having two chambers arranged one above the other, the lower chamber communicating with said cylinder and the upper chamber communicating with a discharge line, a port connecting said chambers, a valve to control said port, and a nozzle extending into said upper chamber, having itsend arranged above the bottom wall thereof and having a permanently open passage connecting said chambers.

8. In a pump, a cylinder, a piston mounted in said cylinder, a casing having two chambers arranged one above the other, the lower chamber communicating with said cylinder and the. upper chamber communicating with a discharge line, a port connecting said chambers, a valve to control said port and a nozzle extending through the wall which separates said chambers, said nozzle having a longitudinal passage connecting said chambers and having its upper end tapered.

In testimony whereof, I aflix my'signature in presence of two witnesses.

HUGHW. KIMES.

Witnesses:

EDWARD L. REED, F. W. SOHAEFER. 

